Only when the optical axis is calculated strictly, can the deformation of the shaft be disturbed by force?

The service life is very important for any product, so is the linear optical axis. The service life affects its performance and change in the process of work. So how do we measure the service life of the optical axis?
If it is contrary to the above situation, it is necessary to select the straight optical axis with the thicker diameter, how thick it is, and to calculate the perturbation deformation of the axial force strictly. Because the actual situation is more complex, so try to choose according to experience, the recommended diameter of 25-30 optical axis.
We can start from two aspects, on the one hand, the directive life of the linear optical axis, but also in normal working conditions, the life of the linear optical axis will be affected by environmental factors and other factors. So it is the same product, its life may be different, in order to extend the life of the product, must be in accordance with the normal maintenance and use requirements. Optic axis
If we can prevent such problems? On the one hand, it is necessary to avoid sharp changes in shaft diameter, use large fillet transition as far as possible, and select materials with better comprehensive performance. By proper treatment, the surface hardness of thread should be solved and the surface stress concentration should be reduced. The surface finish should be improved and the stress failure should be minimized. On the other hand, ensure machining accuracy and pay attention to adjustment.